Controlling dynamical thermal transport of biased bilayer graphene by impurity atoms

Hamed Rezania,Mohsen Yarmohammadi

doi:10.1063/1.4960378

Hamed Rezania, Mohsen Yarmohammadi

Open Access

PDF Available

https://doi.org/10.1063/1.4960378

Copy DOI

Export

Save

Cite

Abstract
Highlights/Summary
Full-Text PDF
Similar Papers

Abstract

Listen

We address the dynamical thermal conductivity of biased bilayer graphene doped with acceptor impurity atoms for AA-stacking in the context of tight binding model Hamiltonian. The effect of scattering by dilute charged impurities is discussed in terms of the self-consistent Born approximation. Green’s function approach has been exploited to find the behavior of thermal conductivity of bilayer graphene within the linear response theory. We have found the frequency dependence of thermal conductivity for different values of concentration and scattering strength of dopant impurity. Also the dependence of thermal conductivity on the impurity concentration and bias voltage has been investigated in details.

Highlights

Graphene has received much attention in the last few years due to its unique properties
We address the dynamical thermal conductivity of biased bilayer graphene doped with acceptor impurity atoms for AA-stacking in the context of tight binding model Hamiltonian
We study the effects of site dilution or unitary scattering and bias voltage on the dynamical thermal conductivity of AA- stacked bilayer graphene within the well-known self-consistent Born approximation.[14,31,32]

Summary

Introduction

Graphene has received much attention in the last few years due to its unique properties. In addition to the significant interests in fundamental physics, stemming in part from the relativistic-like behavior of the massless charge particles around the Dirac cone, this material is very attractive in many applications, in high speed devices.[1,2,3] the gapless electron spectrum of monolayer graphene makes it difficult to turn off the electrical current due to tunneling. Bilayer graphene (BLG) can provide a finite band gap up to hundreds of meV, when the inversion symmetry between top and bottom layers is broken by an applied perpendicular electric field.[4,5] A current on/off ratio of about 100 was observed at room temperature, offering a much needed control for nonlinear functionality.[6]. Bilayer graphene, which are made out of two graphene planes, have been produced by the mechanical isolation and motivated a lot of researches on their transport properties.[9,10,11]

Methods

Results

Conclusion